International News Service v. Associated Press, 248 U.S. 215 (1918), also known as INS v. AP or simply the INS case, is a 1918 decision of the United States Supreme Court that enunciated the misappropriation doctrine of federal intellectual property common law: a "quasi-property right" may be created against others by one's investment of effort and money in an intangible thing, such as information or a design. The doctrine is highly controversial and criticized by many legal scholars, but it has its supporters.

The International News Service (INS) was a U.S.-based news agency (newswire) founded by newspaper publisher William Randolph Hearst in 1909.